A hybrid reconstruction algorithm for electrical impedance tomography

作者：Hu Li^*; Wang Huaxiang; Zhao Bo; Yang Wuqiang

来源：Measurement Science and Technology, 2007, 18(3): 813-818.

DOI：10.1088/0957-0233/18/3/033

• electrical impedance tomography
• image reconstruction
• Krylov subspace
• hybrid method

Electrical impedance tomography (EIT) is a technique for reconstructing the conductivity distribution inside an inhomogeneous distribution by injecting currents at the boundary of a subject and measuring the resulting changes in voltage. A hybrid method is proposed for solving the inverse problem for EIT, which combines the Krylov subspace and the Tikhonov regularization for double levels of regularization to the ill-posed problem. Numerical simulation results using the hybrid method are presented and compared to those from truncated singular value decomposition (TSVD) regularization and the Tikhonov regularization. Experimental results with the hybrid method are also presented, indicating that the hybrid method can reduce the computation time, and improve the resolution of reconstructed images with the regularization parameter automatically chosen by the L-curve method.

• 出版日期2007-3
• 单位天津大学